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Computer Tech

A+ Certification Questions

What is the i/o address for com1? 3f8
What is the i/o address for com2? 2f8
What is the i/o address for com3? 3e8
What is the i/o address for com4? 2e8
T OR F** Before sending data, a modem sends a request to send signal, or RTS. True
ISDN uses _______________ technology. only digital
A COM port is a _______ port. serial
Modems use ________________ transmission. asynchronous
CD-Roms *typically* hold ______ of data. 650M
The terms "red book", "yellow book", and "orange book" refer to: CD-Rom standards
CD-Roms are read by _________. laser diodes
Which of the following can cause CDs to be misread? Select all that apply. smudges, fingerprints, scratches, cracks, slight melting all of the above
In a computer with an eide adapter, where should you connect an ATA CD-Rom drive? on the secondary ide
Your IDE CD-Rom drive is attached to the primary IDE adapter with your hard drive. How should its jumpers be set? as slave
What does MSCDEX.EXE do? It's a CD-Rom DOS driver
A CD-Rom drive always uses IRQ: depends on the adapter it's attached to
T OR F** If a computer's bios allows it, you can boot from a CD-Rom. True
A single speed CD-Rom drive transfers data at: 150 KBs per second
Your CD-Rom audio cable connects to the: sound card (or motherboard if sound is integrated with it)
Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because: there are alot more i/o addresses than IRQs.
T OR F** SCSI adapters usually don't need drivers, just the devices that interface with them. False
T OR F** Most SCSI-2 devices will work fine with SCSI-1 adapters. True
How many devices can connect to the typical SCSI adapter? Assume it has only one data connector. 7
How many devices can be used on a single SCSI bus? Keep in mind that the SCSI host adapter counts as a device. 8
What is the jumper setting on a SCSI device to configure it to use the fourth SCSI id? Remember, SCSI ids start with zero. 011
Which type of interface provides for the fastest data transfer? IDE, SCSI, parallel, serial or ISA SCSI
T OR F** In addition to i/o port addresses, SCSI adapters also use a range of rom addresses for their onboard bios. True
SCSI-2 cables have how many pins? 50
IDE cables have how many pins? 40
You are about to install a second IDE hard drive in a PC that has only one IDE adapter. Your first hard drive will still be the boot drive. How should the second drive be configured? as a slave
What is the maximum number of IDE drives that EIDE will support? 4
On a flat data cable, a red or blue stripe means: pin 1
Most PCs give a single beep on bootup to indicate they are ok hardware wise. You boot your PC and don't get a beep. What should you check first? speaker
A sound card typically uses which IRQ? 5
Your IDE hard drive is not spinning up when you turn on the PC. What is the most likely problem. loose molex connector
I once had a PC with no video. I replaced the system board, CPU, and video card, and still had no video. I then replaced the IDE cable and fixed the problem. Am I telling the truth? Yes!
T OR F** A virus can mimick just about any hardware symptoms you can think of. True
A static jolt of as little of ____ volts can fry most any PC integrated circuit. 30
A human cannot feel a static discharge as high as ____ volts. 200
ESD is ___________. electrostatic discharge
What's the best way to prevent damaging your PC with static electricity? wear an ESD wrist strap
What is EMI? electro﷓magnetic interference
You're on your PC at midnight and an electric storm pops up. What's the best way to protect your PC. unplug the PC and remove phone line from the modem
When referring to hard drives, HDI stands for: head-to-disk interference
You should never put floppy drives, hard drives, or even VCR tapes or cassette tapes on top of speakers (or near any other source of magnetism) because of: EMI
Static electricity thrives in which type of environment? cold and dry
What's the best way to protect your hard drive data? regular backups
A CRT's grid voltage can be as high as: 15,000 volts
A monitor's CRT (cathode ray tube) can pack quite a wallop of a charge even if it's been turned off for several days or more. Before you service a monitor, you must discharge the CRT using a tool specific for that purpose. Before you do the discharge, wha make sure the monitor is unplugged
Which component stores an electrical charge? capacitor
On PC power supplies, the wire attached to pin one is usually: white or orange
If the voltage on pin 1 of the power supply is not in the range of ______ volts, the PC will not boot. 2.5 - 5
The output voltages of a PC power supply are in the form of _____ current. DC
A spike is a sharp and sudden rise in voltage. It's duration is usually measured in: milliseconds
Resistance is measured in units of: ohms
Current is measured in units of: amps
Capacitance is measured in units of: farads
Voltage is measured: in parallel
Resistance is measured: after breaking the circuit
Current is measured: only when you turn the device off first, then connect your meter to the device in series, then turning it back on
Anti-static plastic bags are: conductive
POST stands for: power on self test
POST is done when the PC is: first turned on or reset
The POST routine, which counts system board ram first, is stored in: rom bios
A 1xx (x can be any digit) POST error code indicates a problem with the: system board
A 2xx POST error code indicates a problem with: ram or rom
A 3xx POST error code indicates a problem with: keyboard
A 4xx, 5xx, or 24xx POST error code indicates a problem with: video adapter
A 17xx indicates a problem hard drive or controller
A 6xx indicates a problem with the: floppy drive
A parity error usually indicates a problem with: memory
How many bits in a byte? 8
Type one PC cards: are the thinnest PC cards
The floppy drive uses which DMA (direct memory access) channel? 2
You do a DIR on a diskette, remove it and insert another, and get the same DIR listing from the first diskette. This is known as a "phantom" directory, and it is caused by: line 34 on the floppy is bad or deffective floppy drive
The power connector on a floppy drive is called a: berg connector
The print from a dot﷓matrix printer is light and uneven. This is most likely caused by: worn ribbon
The print from a dot﷓matrix printer is sometimes light, sometimes dark. This is most likely caused by: paper not advancing properly
On a dot-matrix printer, regular lube maintainence should be followed, but this component should never be lubed: printhead
When you move a mouse, the mouse pointer is positioned via: pulses of light
Your laser printer is on, you hear the fan running, but it won't print. What is the first thing you should check? that the printer is online
In laser printing, there are six steps the printer follows. What comes between the conditioning phase and the developing phase? writing phase
During the laser printer's conditioning phase a uniform charge of _______ is placed on the photosensitive drum. -600 volts
Your laser printer gives you an error code 50. This is usually caused by a defective: fuser assembly
Laser printer toner is composed primarily of: particals of plastic resin and iron oxide (rust)
Select the best choice for cleaning laser toner from clothing: clean cloth with cool water
During the fusing process, toner is: melted into the paper
On the PC side, the printer port is a: 25 pin female parallel connector
ISA is a ___ bit technology. 8/16
T OR F** You can have EISA and MCA devices in the same PC. False
T OR F** You can place an ISA device in an EISA slot. True
You can only place an MCA device in an MCA slot. True
What is the first CPU to include an internal math coprocessor? 486DX
You plug a power supply's connectors onto the system board. You know you did it correctly because: the two sets of black wires are together in the middle
Before upgrading your operating system, you should first: backup your hard drive
What DOS program can you run to see which serial ports are detected? MSD
Where would you load the mouse driver mouse.sys? config.sys
Where would you place mouse.com or mouse.bat? autoexec.bat
What is a TSR? terminate and stay resident program
Where are most TSRs loaded? autoexec.bat
Where is the "FILES=" statement placed? in config.sys
Where is the "BUFFERS=" statement placed? in config.sys
T OR F** Himem.sys must be loaded before loading emm386.exe. True
T OR F** You can run Windows 3.1 or 3.11 without loading himem.sys. True
T OR F** You must have himem.sys loaded before you can load DOS high. True
When DOS is loaded high it is placed in the HMA (high memory area). This is located: anywhere in expanded memory
To load DOS high you must place a statement in config.sys. It is: dos=high
The reason you load DOS high is to: free up more expanded memory
The upper memory area is located: between 640k and 1024k
Extended memory is: anything above 1024k
Extended memory is managed by: himem.sys
Expanded memory is: paged memory
Expanded memory is managed by: emm386.exe
Conventional memory is: anything below 1024k
By default, DOS will load where? conventional memory
UMBs, or upper memory blocks are located where? between 640k and 1024k
What statement in config.sys will allow DOS access to unused UMBs? DOS=UMB
What DOS command shows which TSRs are loaded? TSR-SHOW
The DIR command shows a single directory listing. What switch is required to show the subdirectories inside the directory where you typed the DIR command? /s
You wish to see the hidden files in a directory and you type Yes
What two DOS commands lets you know the presence of hidden files? chkdsk and dir
What are the two hidden DOS system files? io.sys & msdos.sys
In CMOS setup, if you enable Rom Bios Shadowing, what happens? a copy of the bios is placed in ram
What does XMS refer to? extended memory
What does EMS refer to? expanded memory
Virtual memory is composed of ram and: a swap file
Memory that is paged out to the hard drive is known as: virtual memory
What device driver must be loaded in config.sys to enable power management on a laptop computer? power.exe
As you soon as you see DOS starting, what key do you press to bypass the startup files? F5
As soon as you see DOS starting, what key do you press to step through the startup files? F8
Which command makes a file read only? attrib +r "filename"
Which file displays the DOS prompt? command.com
"Loadhigh" or "LH" is used to load TSRs into upper memory. Where is this statement used? autoexec.bat
Which file contains the DOS kernel? io.sys
A cluster is the minimum file allocation unit. A cluster is composed of: sectors
What command is used to partition a hard drive? fdisk
What is the largest partition size that DOS supports? 2.1 Gig
What command displays a disk's volume label? vol
What command changes or adds a volume label? label
Windows 3.1 no longer supports which mode that Windows 3.0 supported? real
Win.com supports a number of switches to force Windows to start in the mode selected. You enter win.com /s at the DOS prompt. How is Windows started? standard mode
The Windows file system.ini contains primarily: Windows system settings and device drivers
What is a PIF? program information file
9 bit SIMMs have how many pins? 30
What is the maximum length for a parallel cable? 15ft
What IRQ does the real time clock use? 8
What form of software can also be called firmware? system BIOS
After you install a floppy drive and restart the system, the floppy drive light stays on constantly and you get an "FDD Controller Failure" POST error. What is the problem? floppy cable is backwards
What type of port communicates information to a peripheral device one bit at a time? serial port
Should you wear a grounding strap when servicing a CRT monitor? No
If your monitor just shows dots when you turn it on, what is most likely the problem? bad video RAM
You have two hard drives installed on your primary EIDE controller. You install a CD-ROM on your second EIDE controller. What jumper setting would you use for the CD-ROM? Master
What factor determines the amount of RAM a CPU can control? width of the address bus
The correct AT command to tell a modem to hang up is? ATH
The AT command to tell a modem to dial a number is? ATD (number to dial)
locations in memory are referred to as? addresses
What is the IDE CMOS/BIOS limit for the size of a hard drive? 504MB
You can probably determine that a monitor is working, even though it is not connected to a PC, by performing what action? turn up the brightness to see if the raster appears
What purpose does the ROM serve? starts the system when the computer is turned on
What is the difference between SRAM and DRAM? SRAM has built in switches and does not have to be refreshed
What type of printers are considered impact printers? Dot Matrix & Daisey Wheel
How does a Pentium Pro processor differ from a Pentium processor? Pentium Pro has a onboard L2 cache
What is the binary equivalent of decimal 3? 011
In order for a device to communicate with the CPU it must have? an I/O address
CD ROM is Secondary master or Primary slave? Secondary Master
Created by: meanpplsuk